var http_url = 'http://140.143.228.54:81';
var ws_url = 'ws://140.143.228.54:81';
function setCookie(c_name, value, expiredays) {
    var exdate = new Date()
    exdate.setDate(exdate.getDate() + expiredays)
    document.cookie = c_name + "=" + escape(value) +
        ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString())
}

function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=")
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1
            c_end = document.cookie.indexOf(";", c_start)
            if (c_end == -1) c_end = document.cookie.length
            return unescape(document.cookie.substring(c_start, c_end))
        }
    }
    return ""
}

// function checkCookie() {
//     username = getCookie('username')
//     if (username != null && username != "") {
//         alert('Welcome again ' + username + '!')
//     }
//     else {
//         username = prompt('Please enter your name:', "")
//         if (username != null && username != "") {
//             setCookie('username', username, 365)
//         }
//     }
// }